The course covers the following topics: Different troubleshooting techniques related to HVACR systems; Required steps to diagnose/analyze/define mechanical/electrical malfunctions for various residential HVACR units (e.g., refrigerators, deep freezers, water cooler, ice makers, cold stores, window, split, mini-split, and central package); Fault detection/remedy/repair procedures; and Main faults in automobile air-conditioning systems and their repairs.